Subnautica 2 Steam Deck
Subnautica 2 Steam Deck compatibility should be treated as to be tested until reliable launch-day results or an official Steam Deck rating are available.
Last updated: May 2026
Steam Deck Status: To Be Tested
Subnautica 2 Steam Deck compatibility should be treated as to be verified until reliable launch-day results are available. Official Steam Deck Verified status has not been confirmed.
Steam Deck Compatibility Overview
Official Verified StatusNot yet confirmed
Expected PerformanceTo be tested at launch
Controller SupportFull controller support expected
Proton / SteamOSTo be verified
Current Steam Deck Status
At Early Access launch, Subnautica 2 does not yet have an official Steam Deck Verified rating. We recommend treating Steam Deck compatibility as unverified until post-launch testing confirms functionality. Check the Steam store page for the latest verified status.
Steam Deck Verified Status
Steam Deck Verified is a Valve rating that confirms a game works well on the Steam Deck. Subnautica 2 has not been confirmed as Steam Deck Verified at Early Access launch. We will update this page once verified ratings or community testing results are available after launch.
SteamOS and Proton
Subnautica 2 will likely run through Proton on Steam Deck since there is no native Linux SteamOS build. The original Subnautica runs on Proton and most Unity-based games have good Proton compatibility. However, launch-day testing is needed to confirm stability.
Controller Support
Subnautica 2 supports controller input. On Steam Deck, the built-in controls and trackpads should work. The game has been designed with controller support in mind, so gamepad controls on Steam Deck should function properly.
Expected Settings for Steam Deck
If Subnautica 2 runs on Steam Deck, players may need to reduce graphics settings from default to maintain smooth framerates. Expected adjustable settings include: water quality, shadow resolution, texture quality, vegetation distance and post-processing effects. We will update this section with confirmed settings after launch-day testing.
Sources checked
Frequently Asked Questions
Is Subnautica 2 Steam Deck Verified?
Steam Deck Verified status for Subnautica 2 has not been confirmed at Early Access launch. Check the Steam store page or this page after launch for updated status.
Can I play Subnautica 2 on Steam Deck?
Steam Deck compatibility is to be verified after launch. The game supports controllers and will likely run through Proton, but official verification is pending.
Will Subnautica 2 run well on Steam Deck?
Performance on Steam Deck is to be tested. Subnautica 2 is a visually demanding game, so reduced settings may be needed for smooth gameplay.
Does Subnautica 2 have controller support on Steam Deck?
Yes, Subnautica 2 supports controller input. The Steam Deck's built-in controls should work with the game.
Should I buy Subnautica 2 on Steam for Steam Deck?
If you primarily plan to play on Steam Deck, we recommend waiting for confirmed Steam Deck compatibility before purchasing, unless you also have a PC to play on.